How many calories in black tea with tapioca no sugar added?

Black tea itself has negligible calories, typically around 2 calories per cup. The calorie content in tapioca pearls varies, but a serving of about 1/4 cup contains approximately 100-120 calories. Therefore, a cup of black tea with tapioca and no sugar added would generally have around 100-122 calories, depending on the exact amount of tapioca used.